Metallic sash



A. M. LANE METALLIC SASH Nov. 24, 1931.

Filed May 26, 1930 1705 Hr TOP/v6 K5.

Patented Nov. 24, 1931 UNITED STATES ALFRED I. LANE, OF ST. LOUIS,MISSOURI mirarme sasn Application led Hay 26, 1980. Serial No. 455,597.

This invention relates to metallic frames, particularly to metallicframes for window sashes. The principal objection to such metallic sashframes is that, in cold weather, the

frames become very cold due to the hi h thermal conductivity of themetal, there y causing the roomside of the frames to sweat or becomecoated with frost when the warm air in the room is cooled upon contactwith the cold frames; and considerable damage takes place when the waterruns down on the sills and walls. Another objection is that additionalfuel is required to overcome the heat loss from the room through themetal sash frames. The principal object of the present invention is toproduce a metallic sash frame of. low thermal conductivity which willprevent the loss of heat through the frame and condensation of moistureon roomside thereof. Other objects are simplicity and cheapness ofconstruction, ease of assembly, and compactness of design. The inventionconsists in a built up metallic frame whose parts are separated fromeach other by material of low thermal conductivity. The invention alsoconsists in the construction, combinations and arrangements of partshereinafter' described and claimed.

In the accompanying drawings, which form part of this specification andwherein like symbols refer to like parts wherever they occur, v i

Fig. 1 is an elevation, partly in section, of an insulated metallicwindow sash embodying myY invention,

Fig. 2 is a cross-section on the line 2-2 of Fig. 1,

Fig. 3 is a cross-section on the line 3-3 of Fi 1 lig., 4 is a similarsection showing a modified construction of frame; and

Fig. 5 is a view showing the parts of the frame shown in Fig. 4 beforeassembly.

Referring to Figs. 1 to 3, inclusive, of the accompanying drawings, myinvention is shown in connection with a metallic window sash frame whichcomprises a. continuous, one-piece tubular main frame A made of a lengthof seamless steel tubing, which is bent to the desired shapeand has itsends disposed in abutting relation and welded together to form said mainframe. If desired, the tubular main frame or core of the sash ma be madeof separate lengths of tubing with their adjacent ends mitred or Weldedtogether 56 at the corners of the frame. As shown in the drawings, thetubing is of a cross-sectional shape, preferably circular, Well adaptedtov resist forces which tend to cause winding or twisting of the frame.-

The tubular main frame is covered by or encased within a metallicornamental and protective outside frame or casing B, which serves alsoas a seat for the sash pane C. For purposes of assembly and removal, theoutside frame or casing B com rises inside and outside frame sections 1and 2, respectively, of substantially channel-shaped cross-section. Theinside frame section 1 straddles the tu- -bular main frame A; and theoutside frame Section 2 straddles the inside frame section 1 and thetubular main frame A straddled thereby. The two frame sections aresecured together at regularly spaced intervals preferably by means ofrivets 3 that pass through 75 the overlapped side flanges of thechannel` shaped inside and outside frame sections 1 and 2 of the outsidecasing B and the tubular main frame A. The outside frame section 2 hasits web extended to form an edge 80 Hangs/1; adapted to cooperatewiththe window frame. The inside frame section 1 has its web extended toform an ed e flange 5 which serves as a backing flange or the sash paneC, which, in accordance with common practice, is held in position bymeans of putty 6.

In order to prevent heat transference by conduction throught-he metallicsash frame, the main frame A and the inside and outside frame sections 1and 2, respectively, of the outside frame or casing B are separated orspaced from each other by means'of strips 7 and 8, respectively, of feltor other material having a lou7 thermal conductivity. 95 The felt strip7 is interposed between the tubular main frame A and the channel of theinside frame section 1 of the outside casing or frame B and is heldtherein preferably by pinching or bending the side flanges of 10 thechannel inwardly at intervals, as at 9 over said tubular main frame.This inward pinching or crimping of the side flanges ot thechannel-shaped inside frame section l also serves to retain the tubularmain frame A therein. The other felt strip 8 is seated in the channel ofthe outside frame section 2 of the outside frame or casing B and servesto separate the web of the channel of said section from the tubular coreand the side flanges of the channel from the side llanges of the insideframe section l of said casing. The inner margin of the felt strip 8projects inwardly beyond the inner side flange of the outside framesection of the outside casing B along the flange 5 and forms a flexibleor cushioned backing for the sash pane C.

ln the modified construction shown in Figs, 4 and 5 the main frame A ofthe sash frame is in the form of a solid bar that is provided along itsopposite sides with longitudinally extending grooves 10. The outsideframe or casing B', within which said bar is encased comprises insideand outside frame sections la and 2a, respectively, that are providedwith side flanges l1 adapted to seat within said grooves. The two framesections la and 2a, respectively, of the outside rame or casing B areinsulated from each other and from the main frame A by means of stripsof felt interposed between the parts. The two frame sections of theoutside casing B are held in position about the main frame member A`without the use of rivets, by bending their side flanges 11 inwardly farenough to seat within the grooves 10 provided therefor in said mainframe memberV and thus bring about an interlocking engagement of themain frame and casing.

The hereinbefore described arrangement provides a neat, lightweightmetallic sash that is strong and rigid enough to resist any strainstending to distort the frame; it also prevents the flow of heat from theside of the sash having the higher temperature to the side having thelower temperature and thereby prevents loss of heat through the sashframe and precipitation of moisture on the roomside of the sash frame;and it also permits the metallic frame members and the insulating stripstherefor to be readily assembled to form the frame. i

Obviously, the invention is not restricted to sash frames; but isapplicable to other metallic frames and constructions wherein it isdesirable to prevent loss of heat through the metallic frame.

What I claim is:

l.. A metallic framing member comprising an 1ns1de member and asectional casing member therefor, and a suitable heat insulatingmaterial separating the sections of said sectional casing member fromeach other and from said inside member.

2. A metallic frame comprising a main frame and a sectional casing frametherefor, and heat insulating material separating the sections of saidcasing frame from each other and from said tubular main frame.

3. A metallic sash frame comprising room side and outside frame sectionsof substantially channel-shaped cross-section fitting one within theother and heat insulating material separating said sections.

4l. A metallic sash comprising a main frame member and a casing frametherefor, said casing frame comprising inside and outside framesections, and heat insulating material for separating said framesections from each other and said main frame.

5. A metallic sash comprising a main frame and a casing frame, saidcasing frame comprising two frame sections of substantiallychannel-shaped cross-section,said channel-shaped frame sections fittingone within the other with the main frame interposed therebetween, andheat insulating material for separating said channel-shaped framesections from each other and from said main frame.

6. A metallic member comprising an inside member, a frame casingtherefor, said main casing comprising two sections of substantiallychannel-shaped cross-section, said channel-shaped casing sections ttingone within the other with the inside member interposed therebetween, andheat insulating material for separating said channel-shaped frame casingsections from each other and from said inside member.

7. A metallic sash comprising a main frame and a casing frame therefor,said casing frame comprising inside and outside frame sections ofsubstantially channelshaped cross-section, the inside frame sectionstraddling the main frame and the outside rame section straddling theinside frame section, and heat insulating material for separating saidchannel-shaped frame sections from each other and from said main frame.

8. A metallic sash comprising a main frame and a casing frame therefor,said casing frame comprising inside and outside frame sections ofsubstantially channelshaped cross-section, the inside frame sectionstraddling the main frame and the outside frame section straddling theinside frame section, heat insulating material for separating saidchannel shaped frame section from each other and from said main frame,and means for securing the parts together.

9. A metallic sash comprising a main :trame of circular cross-sect1onand a casing frame therefor comprising inside and outside frame sectionsof substantially channelshaped cross-section, the inside frame sectionstraddling the main frame, a strip of heat insulating materialinterposed between said inside frame section and said main frame, andmeans for securing said inside frame section and said tubular frame tof.getherwith the insulating material therebe- `tween, said outside framesection straddling said inside frame section, a strip of heat insulatingmaterial interposed between said m outside frame section and the main.frame and the inside frame section, and means for securing the inside'and outside frame sec'- tions together andto said main frame.

10. A metallic sash frame comprising a 15 main frame and a casingtherefor, Vsaid caslng comprising two .frame sections, 'and insulatingmaterial separating said frame sections from each other and said mainframe, the frame sections having bendable portions 20 adapted to be bentinto mterlocked engagement with said main e. Signed at St. Louis,Missourntlns 94th day of May, 1930.

